i made a Web Service project in visual studio 2008. then added 2 "Web Service" files to the project. Service1.asmx Imports System.Web.Services Imports System.Web.Services.Protocols Imports System.ComponentModel ' To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line. ' <system.web.script.services.scriptservice()> _ <system.web.services.webservice(namespace:="http://tempuri.org/")> _ <system.web.services.webservicebinding(conformsto:=WsiProfiles.BasicProfile1_1)> _ <toolboxitem(false)> _ Public Class Service1 Inherits System.Web.Services.WebService <webmethod(true)> _ Public Function HelloWorld() As String Session("foo") = "bar" Return "Hello World" End Function End Class Service2.asmx Imports System.Web.Services Imports System.Web.Services.Protocols Imports System.ComponentModel ' To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line. ' <system.web.script.services.scriptservice()> _ <system.web.services.webservice(namespace:="http://tempuri.org/")> _ <system.web.services.webservicebinding(conformsto:=WsiProfiles.BasicProfile1_1)> _ <toolboxitem(false)> _ Public Class Service2 Inherits System.Web.Services.WebService <webmethod(true)> _ Public Function HelloWorld() As String If Session("foo") <> "bar" Then Throw New UnauthorizedAccessException End If Return "Hello World" End Function End Class After i made a windows application, where i made a "Service Reference" to both web service classes/files. The problem is that Service1.asmx doesn't share it's session with Service2.asmx,... I get the thrown "UnauthorizedAccessException" on calling "Service2.HelloWorld()" because the session is not created in Service2.asmx after calling Service2... Public Class Form1 Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Dim bhp As New System.ServiceModel.BasicHttpBinding bhp.AllowCookies = True Dim x As New ServiceReference1.Service1SoapClient(bhp, New ServiceModel.EndpointAddress("http://localhost/ImsBrowserWebService/Service1.asmx")) Dim y As New ServiceReference2.Service2SoapClient(bhp, New ServiceModel.EndpointAddress("http://localhost/ImsBrowserWebService/Service2.asmx")) MsgBox(x.HelloWorld) MsgBox(y.HelloWorld)

i think it's impossible, please tell me the answer